Issue 1

September 2017

ABSTRACT — this paper presents the modeling, simulation and implementation of space solar photovoltaic cells topology used in ISRASAT1 cube satellite. The methodology is to use MATLAB/SIMULINK environment in order to observe the functionality, performance, and ability of photovoltaic cells to provide the power needed by the CubeSat electrical power system. The current-voltage and power-voltage characteristics are obtained for the solar PV module with variable temperature and fixed radiation, as well as for variable radiation and fixed temperature, using mathematical model implemented by MATLAB/SIMULINK.

Keywords—Photovoltaic Cell, Radiation, Temperature, Model, Cube Satellite, ISRASAT1

Arafa Aldaw Mohammed Abaker1, Dr. Amin Babiker Abd AlNabi Mustafa2

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ABSTRACT —Cube satellites are small satellites that are used for scientific and educational purposes. The electrical power system of a Cube-Sat is responsible for supplying sufficient electric voltages and currents to the different subsystems onboard. The electrical power system of the Cube-Sat consists of solar cells, voltage converters, batteries, sensors monitoring and protection circuits. It is responsible for receiving power from solar cells and storing it in batteries, and to deliver power to other subsystems onboard of the satellite and protect the Cube-Sat subsystems from over currents connected with the device breakdown. In this paper, author is going to discuss electrical power system architectures, and compare and analyze them, taking ISRASAT1 Cube-Sat as a case study.

Keywords—Cube-Sat, Solar Cell, Battery,Converter, Protection, ISRASAT1

Arafa Aldaw Mohammed Abaker1, Dr. Amin Babiker Abd AlNabi Mustafa2

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ABSTRACT —The aims of this paper to study and analyze target classification of ground targets in FSR using (NN) under high noise levels. This paper unveils the potential and utilization of Neural Network (NN) in radar applications for target classification in forward scattering radar (FSR) in hostile environment recent works reported in the literature review had shown that FSR can be effectively used for classification and (NN) is perfect approach for automatic classification. As proof, result from FSR experiment were used. The target used for this experiment was a ground vehicles represented by typical cars and finally A NN model for target classification is proposed.
Keywords— Neural network, Signal to noise ratio, ForwardScattering Radar

Kanona,M.E.A.1, Ashraf GasimElsid2, Mohamed Khalaf Alla H.M3 and Yassin Abdulkarim Hamdalla4

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ABSTRACT —Cloud computing is architecture for providing computing service via the internet on demand and pay per use access to a pool of shared resources namely networks, storage, servers, services and applications, without physically acquiring them. Cloud computing is a completely internet dependent technology where client data is stored and maintain in the data center of a cloud provider like Google, Amazon, Salesforce.som and Microsoft etc This paper is aimed to introduce the history of cloud computing and service model of it, and present cloud computing security issues and challenges, and discuss the privacy of cloud computing with explain the data security laws and regulations around the world, then design secured approach for the cloud with the virtual machines and database using open source software (OpenStack) and explain the recommended tips that should be followed to secure the cloud.
for target classification is proposed.Keywords—Cloud Computing, Virtual Machine,Private Cloud , IaaS, OpenStack

Mohamed Ismail1, Ashraf GasimElsid2

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ABSTRACT — The emerging internet of things (IOT) and machine-to-machine (M2M) communication markets demand cellular networking standards that operate in the sub-1 G spectrum, providing long-range and low-power operation. There is also a need to offload the information demands of smart phones and lightweight consumer electronics from the cellular network. The IEEE 802. 11af and 802.
11ah specifications aim to solve these challenges by offering a Wi-Fi-like experience with sensible data rates up to and beyond a distance.

F. Samah Abd-albasit, Dr. M. Amin Babiker

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ABSTRACT — The emerging internet of things (IOT) and machine-to-machine (M2M) communication markets demand cellular networking standards that operate in the sub-1 G spectrum, providing long-range and low-power operation. There is also a need to offload the information demands of smart phones and lightweight consumer electronics from the cellular network. The IEEE 802. 11af and 802.

11ah specifications aim to solve these challenges by offering a Wi-Fi-like experience with sensible data rates up to and beyond a distance.

F. Samah Abd-albasit, Dr. M. Amin Babiker

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ABSTRACT —This paper is reporting investigate the influence of Particle Size Distribution (PSD) in dust particle in Microwave (MW) and Millimeter Wave (MMW) Bands. Dust ounces on particle number and surface area for a given particle mass in the environment of dust media – Sand and Dust Storm (SDS) in the microwave and millimeter wave links and significant of use in predictive models.

Mohammed El-Ghazali Hamza1, Ahmed M. Alsawi2, Atif Osman Bakheit,3 andWaleed Gasim 4

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